Ferroli Domiproject F24D PCB Ref. 3980I621
If your boiler does not start, locks out, or exhibits erratic behavior, you may need the Ferroli Domiproject F24D PCB. This part is responsible for controlling the ignition, burner modulation, pump, and safety features of the boiler. When it fails, it is common for fault codes A23, A24, or F04 to appear. This PCB is compatible with models such as the Domiproject F 24 D, Domiproject C 24 D, and Divatech Micro LN F 24 D, among others. Replace it if you notice these symptoms to restore the normal operation of your boiler.
Ferroli boilers compatible with reference 3980I621
PCB with reference 3980I621. Seven confirmed compatibilities: Domiproject F 24 D and Domiproject C 24 D.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Ferroli Domiproject F 24 D | Domiproject | Contrasted |
| Ferroli Domiproject C 24 D | Domiproject | Contrasted |
| Ferroli Domiproject F 32 D | Domiproject | Contrasted |
| Ferroli Divatech Micro LN F 24 D | Divatech | Contrasted |
| Ferroli Domicondens F 24 D | Domicondens | Contrasted |
| Ferroli Easy F 24 D | Easy (FER/Fereasy) | Contrasted |
| Ferroli Essential D 24 E | Essential (Cointra) | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if the reference 3980I621 is the part for your boiler.
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 3980I621. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the PCB 3980I621 resolves.
The PCB controls the ignition, modulation, and safety features of the boiler. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
A different fault code appears each time, with no clear relation to any actual fault in the installation.
Cause: The PCB can fail and generate incorrect readings from the sensors, displaying faults that do not correspond to the actual problem.
Compare the code with the boiler manual and first rule out the component it indicates before considering that the PCB is faulty.
- 02
It works well for domestic hot water but not for heating, or vice versa.
Cause: The PCB manages both circuits separately; a fault can affect only one of them.
Confirm that the fault always occurs in the same mode and does not depend on the actual demand of the installation.
- 03
The panel does not turn on or respond to any button.
Cause: If the PCB does not power the display, you will not be able to see or change anything even if the rest of the boiler is in good condition.
Check the flat connector between the PCB and the panel before replacing either of the two.
- 04
The boiler starts on its own without anyone requesting heating.
Cause: A fault in the PCB can activate an output without a real command from the thermostat or the sensor.
Disconnect the room thermostat and observe if the behavior changes; this way you will be able to determine if the source is in the demand or in the PCB.
Fault codes for Ferroli that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| A23 | Issues with the overall operation of the boiler. | A problem has been detected in the parameters of the PCB. This may affect the overall operation of the boiler. If you notice that the boiler does not respond properly to commands, it may be necessary to check the PCB. |
| A24 | Boiler malfunction. | A problem has been detected in the parameters of the PCB. This may cause a malfunction of the boiler. If you notice that the boiler is not operating correctly, check the PCB. |
| F04 | Inadequate performance of the boiler. | A problem has been detected in the parameters of the PCB. This may affect the performance of the boiler. If you notice that the boiler is not operating efficiently, it is possible that the PCB is failing. |
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Data sheet for the Ferroli 3980I621 PCB.
- Catalogue reference
- 3980I621
- Brand
- Ferroli
- Type of part
- PCBs (control boards)
- Units in stock
- 0 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Ferroli DOMIPROJECT F 24 D Manual (PDF)Document © Ferroli, provided as a technical reference.
Frequently asked questions about the PCB 3980I621
For which models is the Ferroli Domiproject F24D PCB (control board) Ref. 3980I621 compatible?
How many confirmed models are compatible with this PCB?
What fault codes are documented for this PCB?
Is the reference of this PCB PLDPF24D?
Does this PCB work for the Ferroli Divatech C32D?
Spare parts related to Ferroli Domiproject
